Square D Multi 9 Ground Fault Protector – 2-Pole, 40A, 480Y/277V
The Square D (Schneider Electric) Multi 9 ground fault protector (Model M9R41240) combines circuit breaker overcurrent protection with sensitive ground fault detection in a single device. Rated at 40A with a Type A-SI ground fault function and 26 mA instantaneous trip threshold, this 2-pole unit provides enhanced personnel and equipment protection at 480Y/277V.
Key Features
- 2-pole configuration for 2-phase or single-phase plus neutral circuit protection
- 40A rated current
- Type A-SI ground fault protection for sensitive fault detection
- 26 mA instantaneous ground fault trip threshold
- Combined overcurrent and ground fault protection in one device
- Rated for 480Y/277V systems
- Part of the Square D Multi 9 series
Specifications
- Model: M9R41240
- Manufacturer: Square D (Schneider Electric)
- Poles: 2
- Amperage: 40A
- Voltage: 480Y/277V
- Ground Fault Type: Type A-SI
- Ground Fault Threshold: 26 mA Instantaneous
Applications
Suitable for industrial and commercial applications requiring ground fault protection for personnel and equipment at 480Y/277V. Commonly installed in distribution panels, motor control centers, and electrical systems where ground fault circuit interrupter (GFCI) or equipment ground fault protection is required by code or specification.




